Effect of hauling and soaking time of stationary lift nets on fish aggregation using a hydroacoustic monitoring approach

This study aimed to determine the effect of hauling and soaking time of stationary lift nets on the pattern of fish aggregation in the Banyuasin waters, South Sumatra, Indonesia using a hydroacoustic monitoring approach. The fish aggregations were monitored using the SIMRAD EK-15 single beam (200 kH...

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Bibliographic Details
Published in:Egyptian journal of aquatic research 2023-09, Vol.49 (3), p.339-346
Main Authors: Fauziyah, Nurjuliasti Ningsih, Ellis, Arnando, Edo, Fatimah, Agustriani, Fitri, Supriyadi, Freddy
Format: Article
Language:English
Subjects:
Acoustic density
aggregation behavior
Aggregation pattern
Echosounder
fish
Hauling time
hydroacoustics
Indonesia
Light fishing
Soaking time
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Summary:This study aimed to determine the effect of hauling and soaking time of stationary lift nets on the pattern of fish aggregation in the Banyuasin waters, South Sumatra, Indonesia using a hydroacoustic monitoring approach. The fish aggregations were monitored using the SIMRAD EK-15 single beam (200 kHz) during hauling, and the transducer was mounted on the side of the fishing gear. Furthermore, data were collected before (17:00–23:59) and after midnight (24:00–05:00) at four different soaking times (S1, S2, S3, and S4). The data obtained were then analyzed using pairwise comparisons (nonparametric tests). The pairwise test (p = 0.25 > 0.05) showed that there was no significant difference between the acoustic mean densities obtained before and after midnight (292.2 and 178.9 g/m3), but the total values for both periods varied widely (6,797 and 3,507 g/m3). Dunn’s post hoc tests (p = 0.001 
ISSN:1687-4285
2090-3278
DOI:10.1016/j.ejar.2023.05.003